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Finding the Fourth Proportional to 543,513.40, 811,610.21 and 443,871.40

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Solution

The fourth proportional to 543,513.40, 811,610.21 and 443,871.40 is: 662,818.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,513.40 : 811,610.21 = 443,871.40 : x
  2. Step 2: Convert to fraction form
    543,513.40/811,610.21 = 443,871.40/x
  3. Step 3: Cross multiply
    543,513.40x = 811,610.21 × 443,871.40
  4. Step 4: Simplify right side
    543,513.40x = 360,250,560,166.99
  5. Step 5: Solve for x
    x = 360,250,560,166.99/543,513.40
  6. Step 6: Final answer
    x = 662,818.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.